Sirio CX172U CW Base Antenna 172-176 MHz


Experience top-notch signal reception and enhanced communication with the Sirio CX172U CW Base Antenna. Designed for professionals and accessible to all, this high-performance antenna is what you need to take your radio experience to new heights.

SKU: 57-476 Category: Tags: , ,


Crafted with precision using premium materials such as aluminium, brass, galvanized steel, and stronger-than-ever Zamak, this antenna guarantees unmatched durability that stands the test of time. With a weight of just 750 g, it strikes the perfect balance between portability and ruggedness.

Equipped with an innovative Type 3/4 λ coaxial J-pole design, this cutting-edge antenna ensures unrivaled radiation omnidirectionality for seamless connectivity across distances. Its polarization remains linear vertical throughout usage – no compromises made in delivering clear signals during crucial conversations.

Get ready for remarkable amplification! The Sirio CX172U boasts a remarkable gain ranging from an impressive 2 dBd up to a staggering 4.15 dBi. This translates into exceptional signal strength even in challenging conditions or densely populated areas – granting crystal-clear audio that never falters amidst background noise.

Worried about power limitations? Fear not! Our base antenna can handle up to a whopping 250 W (CW) maximum power without breaking a sweat. Perfectly suited for demanding professional environments where reliable connections are non-negotiable.

Safety first! The integrated grounding protection effectively safeguards against potential DC-ground issues – ensuring peace of mind while maximizing performance during intense communications.

Electrical Data

Type 3/4 λ coaxial J-pole
Radiation Omnidirectional
Polarization Linear Vertical
Frequency Range 172 – 176 MHz
Systems 2m-HAM, VHF Marine Band, ORBCOMM M2M, AIS-162 MHz, ISM-169 MHz
Gain 2 dBd – 4.15 dBi
Power 250 W (CW)
Connector UHF-female (SO-239)
Grounding Protection DC-Ground


Mechanical Data

Materials Aluminium, Chromed brass, Galvanized steel, Zamak
Dimensions 1370 mm
Weight 750 g
Mounting Type On-Mast

Additional information

Weight 1 kg